楼上第一题算错了哦!!锵锵~~~
4x+3x/2=22 →(8+3)x/2=22→x=4
8+7x/10=106 → 7x/10=98→x= 140
3/4*6 x-x/3=3/8→ 9x/2-x/3=3/8→ (27-2)x/6=3/8→ x=9/100
4x+3/2x=22 3/2x=22-4=18 x=18*2/3=12
8+7/10x=106 7/10x=98 x= 140
3/4*6 x-1/3x=3/8 9/2x-1/3x=3/8 (27-2)/6x=3/8 x=9/100